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Here is the official release for the GIAC B8 S5 and S5 3.0 direct injected supercharged V6 software. We reported on this software producing huge gains last week. GIAC in their product release comments on this somewhat saying the gains previously seen are among the highest a customer might get. It almost seems as if they are admitting the run was a glory run not applicable to what others might see. We think GIAC should get a few more runs and post graphs that may be a better representation of what most customers will get rather than knowingly putting up a graph they themselves confirm is one of the highest they have seen for tune with intake on 91 pump.

We suggested that such high peak numbers will not be seen on a dual clutch transmission and GIAC would seem to agree as they posted a dual clutch graph but the image is broken on their site. When (or if) they fix it we will update this post with the graph for the S-Tronic/DSG car.

The tune actually ended up making 14 wheel horsepower more on 100 octane than it did on 91 octane. 417 all wheel horsepower from a tune, exhaust, and race gas is very healthy indeed and makes the vehicle much more serious of a BMW N54 rival for tuning.

The tune needs to first be bench flashed before a handheld flashloader can be used with it.

Very simple, the factory tune controls the bypass valve on the supercharger and bleeds off boost after the midrange, watch the curve. By closing it, voila!

Exactly, Audi wanted more power down low so they upped the boost overall. They then put in a bypass to bleed boost as rpm increases thereby limiting peak power. The bypass is of course...electronically controlled, just like the wastegates on the N54.